<!DOCTYPE html><html><head>
   <title>Bootstrap 实例 - 模态框（Modal）插件</title>
   <link href="bootstrap.min.css" rel="stylesheet">
   <script src="jquery-3.3.1.min.js"></script>
   <script src="bootstrap.min.js"></script>
   </head>
   <body>
   <h2>创建模态框（Modal）</h2><!-- 按钮触发模态框 --><button class="btn btn-primary btn-lg" data-toggle="modal" 
   data-target="#myModal">
   开始演示模态框</button><!-- 模态框（Modal） --><div class="modal fade" id="myModal" tabindex="-1" role="dialog" 
   aria-labelledby="myModalLabel" aria-hidden="true">
   <div class="modal-dialog">
      <div class="modal-content">
         <div class="modal-header">
            <button type="button" class="close" 
               data-dismiss="modal" aria-hidden="true">
                  &times;            </button>
            <h4 class="modal-title" id="myModalLabel">
               模态框（Modal）标题            </h4>
         </div>
         <div class="modal-body">
            在这里添加一些文本         </div>
         <div class="modal-footer">
            <button type="button" class="btn btn-default" 
               data-dismiss="modal">关闭            </button>
            <button type="button" class="btn btn-primary">
               提交更改            </button>
         </div>
      </div><!-- /.modal-content --></div><!-- /.modal --></div></body></html>